HF-250 Reverse Circulation Rig

Drill Diameter: 350-1200mm
Drill Depth: 300m
Generator power: 150KwIt is suitable for complex foundation engineering construction, such as soil layer, cemented gravel and rock socketed, and it is widely applied to bridge bored pile and underground diaphragm wall foundation engineering.
1.The impact frequency of reverse circulation rig is 40 times/min, the main and the auxiliary hoisting capacity is 30kN, the motor power is 45kW, not include 6BS pump. 
2.The main and the auxiliary hoisting capacity of reverse circulation rig is 50kN, maximum drilling hole diameter is 2.0m and drilling hole depth is 80m,lifting stroke of hoist is 1.5-3.0m, main power is 75kW.
3.The reverse circulation pump unit is 3PNL and 6BS pump, can be equipped with hydraulic step displacement.


HF-250 Reverse Circulation Rig is a powerful drilling machine designed for water wells, geological exploration, bridge foundations, and large-diameter borehole projects. With up to 300m drilling depth, 350-1200mm drilling diameter range, and efficient reverse circulation technology, it delivers stable performance in complex geological conditions.

Model		HF-250
Drill hole depth (m)		≤300
The hole diameter (mm)		350-1200
Spindle speed (r/min)		9
Spindle power (kw)		7.5*2
The spindle torque (N•m)		22000
Hoist lifting force (kg)		3000*6
Mud pump	Traffic (m³/h)	500
	Power (kw)	30
Generating set	The rated voltage (V)	380
	Rated current (A)	90
	Rated speed (r/min)	1500
	Rated power (kw)	75
Main power supporting power		6110 Diesel
Overall dimensions (L x W x H) (mm)		9200*2500*3500
Single weight (kg)		15000

HF-250 Reverse Circulation Rig

The HF-250 Reverse Circulation Rig is a professional large-diameter drilling machine designed for deep water well drilling, geological exploration, foundation engineering, bridge pile construction, and underground engineering projects. Featuring advanced reverse circulation drilling technology, strong torque output, and reliable structural design, the HF-250 provides an efficient drilling solution for contractors and engineering companies.

The HF-250 Reverse Circulation Rig is widely used in complex foundation construction, including soil layers, cemented gravel formations, and rock socketed drilling applications. It is especially suitable for bridge bored piles, underground diaphragm wall foundations, groundwater development, and large-scale engineering drilling projects.

With a maximum drilling depth of approximately 300 meters and a drilling diameter range of 350-1200mm, the HF-250 is capable of handling various large-hole drilling requirements. Its powerful drilling system, efficient mud circulation, and durable structure make it an ideal choice for professional drilling operations.

Advanced Reverse Circulation Drilling Technology

The HF-250 Reverse Circulation Rig adopts advanced reverse circulation technology to improve drilling efficiency and borehole stability.

During reverse circulation drilling, drilling fluid and cuttings are transported upward through the drill pipe, allowing fast removal of debris from the bottom of the borehole. This process improves drilling speed, reduces drilling resistance, and maintains a cleaner drilling environment.

The reverse circulation system provides several advantages:

Efficient removal of drilling cuttings
Improved borehole cleaning performance
Reduced drilling tool wear
Better drilling stability
Higher productivity during deep drilling operations

This technology makes the HF-250 especially suitable for large diameter drilling projects where efficiency and accuracy are essential.

Powerful Drilling Performance

The HF-250 Reverse Circulation Rig is equipped with a strong drilling system that provides excellent torque and stable operation.

The machine features:

Strong spindle torque output
Stable rotary performance
Efficient mud circulation system
Reliable lifting capability
Continuous drilling operation

The HF-250 uses a powerful diesel power system and professional drilling components to ensure stable performance in demanding working environments. The rig is designed for long-term operation while maintaining high drilling efficiency.

Large Diameter and Deep Drilling Capability

One of the main advantages of the HF-250 Reverse Circulation Rig is its ability to perform large diameter drilling operations.

The machine supports:

Deep water well drilling
Large diameter boreholes
Foundation pile drilling
Geological investigation holes
Engineering construction drilling

With drilling depth up to approximately 300m and hole diameter capability from 350mm to 1200mm, the HF-250 meets the requirements of many professional drilling applications.

Its powerful drilling performance allows contractors to complete complex projects with improved efficiency and reduced operational challenges.

Wide Application Areas

The HF-250 Reverse Circulation Rig is suitable for multiple industries, including:

Water Well Drilling

The HF-250 provides efficient groundwater development solutions for industrial water supply, agricultural irrigation, and municipal water projects.

Geological Exploration

The machine helps collect geological information and evaluate underground conditions through reliable drilling operations.

Foundation Engineering

The HF-250 is widely used for bridge bored piles, underground diaphragm walls, and other foundation construction projects.

Mining and Resource Exploration

The rig provides stable drilling performance for exploration and resource development projects.

Excellent Adaptability to Geological Conditions

The HF-250 Reverse Circulation Rig is designed to operate effectively in different geological environments.

It can handle:

Clay layers
Sand formations
Gravel layers
Cemented gravel
Weathered rock
Soft rock formations

The efficient reverse circulation system helps maintain borehole stability and improves drilling performance in complex formations.

By selecting suitable drilling tools, the HF-250 can adapt to different project requirements and geological conditions.

Durable Structure and Reliable Operation

The HF-250 Reverse Circulation Rig is manufactured with a heavy-duty structure to ensure long service life and dependable performance.

The robust frame provides stability during drilling, while high-quality components reduce maintenance requirements.

Key advantages include:

Strong mechanical structure
Reliable power system
Stable drilling operation
Long equipment lifespan
Reduced downtime

The HF-250 is designed for professional contractors who require dependable drilling equipment for continuous operation.

Efficient Mud Circulation System

The HF-250 uses an efficient mud pump system to support reverse circulation drilling.

The circulation system helps:

Remove drilling debris quickly
Maintain borehole cleanliness
Improve drilling efficiency
Reduce drilling interruptions

A well-designed circulation system improves drilling quality and helps operators achieve better results in large diameter drilling projects.

Easy Operation and Maintenance

The HF-250 Reverse Circulation Rig is designed for convenient operation and maintenance.

The practical structure allows operators to easily control drilling processes and perform routine inspections.

Maintenance advantages include:

Simple operating procedures
Easy access to key components
Reduced service time
Lower maintenance costs

This makes the HF-250 suitable for both experienced drilling contractors and engineering companies.

Main Features of HF-250 Reverse Circulation Rig
Reverse circulation drilling technology
Maximum drilling depth up to 300m
350-1200mm drilling diameter range
Large diameter drilling capability
Strong torque output
Efficient mud circulation system
Suitable for foundation engineering
Suitable for water well drilling
Reliable diesel power system
Durable heavy-duty structure

Why Choose Our HF-250 Reverse Circulation Rig?
1. High Drilling Efficiency

Advanced reverse circulation technology improves drilling speed and reduces downtime.

2. Strong Large-Hole Capability

The HF-250 is designed for large diameter and deep drilling applications.

3. Wide Application Range

Suitable for water wells, geological exploration, bridge foundations, and engineering construction.

4. Stable and Reliable Performance

The strong structure and professional drilling system ensure consistent operation.

5. Easy Maintenance

Practical design reduces maintenance difficulty and operating costs.

6. Professional Technical Support

We provide complete drilling solutions, equipment guidance, spare parts support, and customized services.

FAQS
1. What is the HF-250 Reverse Circulation Rig used for?

The HF-250 is mainly used for water well drilling, geological exploration, bridge pile construction, foundation engineering, and large diameter drilling projects.

2. How deep can the HF-250 drill?

The HF-250 can achieve drilling depths of up to approximately 300 meters depending on geological conditions and drilling methods.

3. What drilling diameter can the HF-250 achieve?

The HF-250 supports drilling diameters from approximately 350mm to 1200mm.

4. What is the advantage of reverse circulation drilling?

Reverse circulation drilling improves cutting removal efficiency, maintains cleaner boreholes, and provides better performance for deep and large diameter drilling.

5. Can the HF-250 drill gravel and rock formations?

Yes. The HF-250 is suitable for soil layers, gravel formations, cemented gravel, and some rock conditions with suitable drilling tools.

6. Is the HF-250 suitable for bridge foundation projects?

Yes. It is widely applied in bridge bored pile and underground diaphragm wall foundation engineering.

7. Is the HF-250 easy to operate?

Yes. The machine is designed with practical controls and a user-friendly structure for efficient operation.

8. Can the HF-250 be customized?

Yes. Different drilling configurations and solutions can be customized according to customer requirements and geological conditions.

Product Conclusion

The HF-250 Reverse Circulation Rig is a high-performance drilling solution designed for deep wells, geological exploration, and foundation engineering applications.

With advanced reverse circulation technology, strong drilling capability, large diameter performance, and durable construction, the HF-250 delivers reliable productivity for professional drilling contractors.

For projects requiring efficient, stable, and economical drilling equipment, the HF-250 Reverse Circulation Rig is an excellent choice.

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TAG: Engineering Drilling Equipment, Hydraulic Drilling Equipment, Heavy Duty Drilling Machine, Rock Drilling Machine, Industrial Water Well Drill, Mining Exploration Drill, Water Well Drilling Rig, Construction Drilling Equipment, Deep Hole Drilling Machine, Reverse Circulation Drilling Rig, Deep Well Drilling Equipment, Professional Drilling Rig, Geological Exploration Rig, Reverse Circulation Drilling Machine, Foundation Drilling Rig, Portable Drilling Rig, Large Diameter Drilling Machine, Groundwater Drilling Machine, Hydraulic Water Well Drill,
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